Re: Fwd: Intel hybrid CPU scheduler always prefers E cores

[Ramses]

Nov 29, 2023, 00:10 by tim.c.chen@xxxxxxxxxxxxxxx:

> On Tue, 2023-11-28 at 23:33 +0100, Ramses wrote:
>
>> I applied the patch on top of 6.6.2, but unfortunately I see more or less the same behaviour as before, with single-threaded CPU-bound tasks running almost exclusively on E cores.
>>
>> Ramses
>>
>
> I suspect that you may have other issues. I wonder if CPU priorities are getting
> assigned properly on your system.
>
> Saw in the original bugzilla 
> https://bugzilla.kernel.org/show_bug.cgi?id=218195
> that you don't see /proc/sys/kernel/sched_itmt_enabled which
> may be a symptom of such a problem.
>
> +Srinivas, is there something Ramses can do to help
> find out if there are issues with cppc?
>
> Tim
>
Yeah I'm getting the impression that something is going wrong on my system. AFAIU, itmt is supposed to be auto-detected and doesn't require additional config?

I have the intel ME disabled on my CPU (it came like that from the OEM), I don't know if that can have an effect?

Let me know if there's any additional info that I can provide.

Ramses